//
//  WBVisitorView.swift
//  MyWeibo
//
//  Created by 5201-mac on 2017/4/28.
//  Copyright © 2017年 wlb-mac. All rights reserved.
//

import UIKit

/// 访客视图
class WBVisitorView: UIView {

    /// 注册按钮
    lazy var registerButton: UIButton = UIButton.cz_textButton("注册", fontSize: 16, normalColor: UIColor.orange, highlightedColor: UIColor.black, backgroundImageName: "common_button_white_disable")
    
    /// 登录按钮
    lazy var loginButton: UIButton = UIButton.cz_textButton("登录", fontSize: 16, normalColor: UIColor.darkGray, highlightedColor: UIColor.black, backgroundImageName: "common_button_white_disable")
    

    /// 访客视图的信息字典 [imageName / message]
    /// 如果是首页 imageName == ""
    var visitorInfo: [String: String]? {
        didSet {
            // 1> 取字典信息、
            guard let imageName = visitorInfo?["imageName"],
                let message = visitorInfo?["message"] else {
                    return
            }
            
            // 2> 设置消息
            tipLabel.text = message
            
            // 3> 设置图像，首页不需要设置
            if imageName == "" {
                startAnimation()
                return
            }
            
            iconView.image = UIImage(named: imageName)

            // 其他控制器的访客视图不需要显示小房子
            houseIconView.isHidden = true
            maskIconView.isHidden = true
        }
    }
    
    // MARK: - 构造函数
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    /// 旋转图标动画(首页)
    private func startAnimation() {
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 15
        
        // 动画完成不删除，如果iconView被释放，动画会一起销毁
        anim.isRemovedOnCompletion = false
        
        // 将动画添加到图层
        iconView.layer.add(anim, forKey: nil)
    }
    
    // MARK: - 私有控件
    /// 懒加载属性只有调用UIKit控件的指定构造函数，其他都需要使用类型
    /// 图像视图
    fileprivate lazy var iconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    /// 遮罩图像 - 不要使用maskView
    fileprivate lazy var maskIconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    
    /// 小房子
    fileprivate lazy var houseIconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    
    /// 提示标签
    fileprivate lazy var tipLabel: UILabel = UILabel.cz_label(withText: "关注一些人，回这里看看有什么惊喜,关注一些物，回这里看看有什么惊喜。", fontSize: 14, color: UIColor.darkGray)
    
}

// MARK: - 设置界面
extension WBVisitorView {
    func setupUI() {
        // 0.在开发的时候，如果能够使用颜色，就不要使用图像，效率会更高！
        backgroundColor = UIColor.cz_color(withHex: 0xEDEDED)
        
        // 1.添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(houseIconView)
        addSubview(tipLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        // 文本居中
        tipLabel.textAlignment = .center
        
        // 2.取消 autoresizing
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
        // 3. 主动布局
        let margin:CGFloat = 20
        
        // 1> 图像视图
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1.0, constant: -60))
        
        // 2> 小房子
        addConstraint(NSLayoutConstraint(item: houseIconView, attribute: .centerX, relatedBy: .equal, toItem: iconView, attribute: .centerX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: houseIconView, attribute: .centerY, relatedBy: .equal, toItem: iconView, attribute: .centerY, multiplier: 1.0, constant: 0))
        
        // 3> 提示标签
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .centerX, relatedBy: .equal, toItem: iconView, attribute: .centerX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .top, relatedBy: .equal, toItem: iconView, attribute: .bottom, multiplier: 1.0, constant: margin))
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 236))
        
        // 4> 注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .left, relatedBy: .equal, toItem: tipLabel, attribute: .left, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .top, relatedBy: .equal, toItem: tipLabel, attribute: .bottom, multiplier: 1.0, constant: margin))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 100))
        
        // 5> 登录按钮
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .right, relatedBy: .equal, toItem: tipLabel, attribute: .right, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .top, relatedBy: .equal, toItem: tipLabel, attribute: .bottom, multiplier: 1.0, constant: margin))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .width, relatedBy: .equal, toItem: registerButton, attribute: .width, multiplier: 1.0, constant: 0))
        
        // 6> 遮罩图像
        // views: 定义VFL中的控件名称和实际名称映射关系
        let viewDict = ["maskIconView": maskIconView,
                        "registerButton": registerButton] as [String : Any]
        let metrics = ["spacing": -20]
        
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[maskIconView]-0-|", options: [], metrics: nil, views: viewDict))
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[maskIconView]-(spacing)-[registerButton]", options: [], metrics: metrics, views: viewDict))
    }
}
